<h5>光の三原色</h5>
<div class="slide-re"><iframe src="https://scratch.mit.edu/projects/892634857/embed" width="485" height="402" frameborder="0" allowfullscreen="allowfullscreen"></iframe></div>
<h5>光の三原色シミュレーター(pHet)</h5>
<div class="slide-re"><iframe src="https://phet.colorado.edu/sims/html/color-vision/latest/color-vision_ja.html" width="800" height="600" allowfullscreen="allowfullscreen"></iframe></div>